Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2022/025005
Kind Code:
A1
Abstract:
A pneumatic tire is provided which has sufficiently reduced rolling resistance during high-speed travel and which has sufficiently improved durability. In this pneumatic tire, which has a tread, at least one rubber layer forming the tread includes a rubber component containing styrene butadiene rubber and isoprene rubber, and is formed from a rubber composition with a loss tangent (30°C tanδ) less than or equal to 0.14, measured under the conditions of 30°C, a 10 Hz frequency, and a 5% initial distortion and a 1% dynamic distortion rate; defining Wt (mm) as the cross-section width, Dt (mm) as the outer diameter and virtual volume V (mm3) as the volume of the space occupied by the tire when said tire is built into the regular rim and is at an internal pressure of 250 kPa, the pneumatic tire satisfies (Formula 1) and (Formula 2). (Formula 1) … 1600 ≤ (Dt2×π/4) / Wt ≤ 2827.4
(Formula 2) … [(V + 1.5 × 10
7)/Wt] ≤ 2.88 × 105
Inventors:
HAMAMURA KENJI (JP)
KAWAI HIROKI (JP)
TOYA SUBARU (JP)
KAWAI HIROKI (JP)
TOYA SUBARU (JP)
Application Number:
PCT/JP2021/027579
Publication Date:
February 03, 2022
Filing Date:
July 26, 2021
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
B60C1/00; B60C3/04; B60C11/00; B60C11/13
Domestic Patent References:
| WO2018186367A1 | 2018-10-11 |
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Attorney, Agent or Firm:
JODAI Tetsuji et al. (JP)
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